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Linear Equation

Solve equations in the form ax + b = c with clear substitution and verification steps.

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Type or paste the equation exactly as you see it.

Equation

Sumvoro reads this as a one-variable linear equationx = 5

Substitution check: both sides equal 21.

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Your problem should look likea × x + b = c

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Put each number in its box.Use 0 when a term is missing.
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a is the number multiplying x
b is the number added or subtracted
c is the value on the other side of =

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Inputs

Build your estimate

3x + 6 = 21

Coefficient a?

3Constant b?

6Right side c?

Calculated:

Source: · Formula release: 2026.10-r4 · Receipt: SV-2026104-1G9K5IT · Educational estimate, not a quote. Verify all assumptions.

Your estimate

Solutionx = 5

Equation classified and checked

Your results

Equation typeOne solution

Solutionx = 5

About displayed precision

Displayed amounts and percentages are rounded for readability. Calculations generally retain more precision; adding rounded rows can differ slightly from a displayed total. The formula and assumptions describe any rounding that is part of the calculation itself.

Steps

Subtract 6 from both sides: 3x = 15
Divide both sides by 3: x = 5
Check: 3(5) + 6 = 21

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Solutionx = 5

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